From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 975D9C31E4B for ; Fri, 14 Jun 2019 19:33:33 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6C2A020866 for ; Fri, 14 Jun 2019 19:33:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="KpoziL82" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6C2A020866 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sntech.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=QQo4/pyk25y0VGfd0dzcxybJ/n7giq4dLTGbNAAuaE4=; b=KpoziL8264BsqH Yc7w7U+G5TRF9Q0fQsUWxdQksxkk84Bk8QdCZsnTcVADcHQ4rejbm2Us4bsyS8q/qIs8AcbgQThkJ B09TBURB7i6JCROSwoJ4dt9sdF6hh9PKCFKgqRFhzm/ylJXIByO7fPK6+srrq1LmaQe+NfNAXzlVF hr6aDUPqPIGUZdvSUUq/5XL9F5BTgiyxcDjmtvyz5NEcaCgQJXy68Alr7hz/u24GEdMkRyPfXolQz K2zeIYkyFtw8mbMRNSUSzqDHcLUG5L6cCmqt59W4ymk6bKFtEB05xik1gWzT1TgfYkM6OJPVblGKF zOEisvermHjy1yLVjVBQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hbrwz-0000GN-Hf; Fri, 14 Jun 2019 19:33:25 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hbrwv-0000FI-JI; Fri, 14 Jun 2019 19:33:22 +0000 Received: from we0305.dip.tu-dresden.de ([141.76.177.49] helo=phil.localnet) by gloria.sntech.de with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hbrwn-00078h-3Q; Fri, 14 Jun 2019 21:33:13 +0200 From: Heiko Stuebner To: Justin Swartz Subject: Re: [PATCH 3/4] ARM: dts: rockchip: add display nodes for rk322x Date: Fri, 14 Jun 2019 21:33:12 +0200 Message-ID: <13456600.FWPkgmLa5g@phil> In-Reply-To: <19cea8f7c279ef6efb12d1ec0822767d@risingedge.co.za> References: <20190614165454.13743-1-heiko@sntech.de> <20190614174526.6F805217D6@mail.kernel.org> <19cea8f7c279ef6efb12d1ec0822767d@risingedge.co.za> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190614_123321_784552_B274B665 X-CRM114-Status: GOOD ( 18.47 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stephen Boyd , mturquette@baylibre.com, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Am Freitag, 14. Juni 2019, 20:32:35 CEST schrieb Justin Swartz: > On 2019-06-14 19:45, Stephen Boyd wrote: > >> diff --git a/arch/arm/boot/dts/rk322x.dtsi > >> b/arch/arm/boot/dts/rk322x.dtsi > >> index da102fff96a2..148f9b5157ea 100644 > >> --- a/arch/arm/boot/dts/rk322x.dtsi > >> +++ b/arch/arm/boot/dts/rk322x.dtsi > >> @@ -143,6 +143,11 @@ > >> #clock-cells = <0>; > >> }; > >> > >> + display_subsystem: display-subsystem { > >> + compatible = "rockchip,display-subsystem"; > >> + ports = <&vop_out>; > >> + }; > >> + > > > > What is this? It doesn't have a reg property so it looks like a virtual > > device. Why is it in DT? > > This is a virtual device. > > I assumed it would be acceptable to it find in a device tree due to > binding documentation, > "Documentation/devicetree/bindings/display/rockchip/rockchip-drm.txt, > which states: > > > The Rockchip DRM master device is a virtual device needed to list all > vop devices or other display interface nodes that comprise the > graphics subsystem. > > > Without the "display_subsystem" device node, the HDMI PHY and > rockchipdrmfb frame buffer device are not initialized. > > Perhaps I should have included this in my commit message? :) As Justin said, that is very much common as the root of the components that make up the drm device and pretty much common in a lot of devicetrees for the last 5 years and longer ;-) . Also gpio-keys also don't have a reg property ;-) . Heiko _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel